for now, make SMconfig non-modal
seting '/mode'
select/deselect logic
launch/apply to all selected
handle cancelled DirSelection
fixed applySettings for all selected SMis

we still have to implemente applySettings() for the SMi itself
enable/disable filesync buttons while synching
designer-UI for SMchannels
use new designer UI for SMchannels

(looks pretty much the same...)
standard name for "meter" (4-channel qsynthMeter)

self.meters -> self.meter
regenerated _ui.py
make MIXctl fixed width
height-align SMchannels & MIXctl
making SMmixer fixed-width

the window is still resizable, but at least the elements stay put